COVER INFORMATION Station: SHANGHAI (Code Sh ) Experiment: Radio/jet Host Galaxy Interactions Exp. Code: ES054A Schedule Version: 1.00 Processed by SCHED version: 6.01 Release: Late March 2005 PI: Richard Schilizzi Address: International SKA Project Office Postbus 2 Dwingeloo The Netherlands Phone: 0521 595270 EMAIL: schilizzi@skatelescope.org Fax: 0521 597332 Phone during observation: 0521 595270 Observing mode: Phase-referencing of a source at 18cm (512 Mb/s) Notes: Wb please omit antennas C&D Schedule for SHANGHAI (Code Sh ) Page 2 Radio/jet Host Galaxy Interactions UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sun 5 Jun 2005 Day 156 --- Next scan frequencies: 1634.49 1634.49 1634.49 1634.49 1650.49 1650.49 1650.49 1650.49 1666.49 1666.49 1666.49 1666.49 1682.49 1682.49 1682.49 1682.49 Next BBC frequencies: 565.51 565.51 565.51 565.51 549.51 549.51 549.51 549.51 533.51 533.51 533.51 533.51 517.51 517.51 517.51 517.51 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 07 30 00 DA193 08 30 07 57.7 -63.6 2.6 93.4 0 1 1 0 07 30 00 07 36 00 --- 08 36 08 56.5 -63.7 2.7 92.4 360 F 1 0 07 37 00 J0655+4100 08 37 08 67.3 -57.1 1.7 107.8 22 1 1 0 07 37 00 07 40 30 =0651+410 08 40 39 66.7 -57.6 1.8 106.7 210 F 1 0 07 40 30 4C41.17 08 40 39 65.8 -57.0 1.8 106.6 -5 1 1 0 07 40 30 07 47 00 --- 08 47 10 64.6 -57.7 1.9 104.8 385 F 1 0 07 47 00 J0655+4100 08 47 10 65.5 -58.4 1.9 104.9 -5 1 1 0 07 47 00 07 50 30 =0651+410 08 50 40 64.9 -58.8 1.9 104.0 205 F 1 0 07 50 30 4C41.17 08 50 40 63.9 -58.1 2.0 103.9 -5 1 1 0 07 50 30 07 57 00 --- 08 57 11 62.8 -58.7 2.1 102.2 385 F 1 0 07 57 00 J0655+4100 08 57 11 63.7 -59.4 2.0 102.3 -5 1 1 0 07 57 00 08 00 30 =0651+410 09 00 42 63.0 -59.7 2.1 101.5 205 F 1 0 08 01 30 J0655+4100 09 01 42 62.8 -59.8 2.1 101.2 57 1 1 0 08 01 30 08 05 00 =0651+410 09 05 13 62.2 -60.1 2.2 100.4 210 F 1 0 08 05 00 4C41.17 09 05 13 61.3 -59.4 2.2 100.4 -5 1 1 0 08 05 00 08 11 30 --- 09 11 44 60.1 -59.8 2.3 98.9 385 F 1 0 08 11 30 J0655+4100 09 11 44 61.0 -60.5 2.3 99.0 -5 1 1 0 08 11 30 08 15 00 =0651+410 09 15 14 60.3 -60.7 2.3 98.2 205 F 1 0 08 15 00 4C41.17 09 15 14 59.4 -60.0 2.4 98.2 -5 1 1 0 08 15 00 08 21 30 --- 09 21 45 58.2 -60.3 2.5 96.8 385 F 1 0 08 21 30 J0655+4100 09 21 45 59.1 -61.1 2.4 96.9 -5 1 1 0 08 21 30 08 25 00 =0651+410 09 25 16 58.4 -61.2 2.5 96.2 205 F 1 0 Schedule for SHANGHAI (Code Sh ) Page 3 Radio/jet Host Galaxy Interactions UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sun 5 Jun 2005 Day 156 --- 08 26 00 J0655+4100 09 26 16 58.2 -61.2 2.5 96.0 57 1 1 0 08 26 00 08 29 30 =0651+410 09 29 47 57.6 -61.4 2.6 95.3 210 F 1 0 08 29 30 4C41.17 09 29 47 56.7 -60.6 2.6 95.2 -5 1 1 0 08 29 30 08 36 00 --- 09 36 18 55.5 -60.7 2.8 94.0 385 F 1 0 08 36 00 J0655+4100 09 36 18 56.4 -61.5 2.7 94.1 -5 1 1 0 08 36 00 08 39 30 =0651+410 09 39 48 55.7 -61.6 2.7 93.4 205 F 1 0 08 39 30 4C41.17 09 39 48 54.9 -60.8 2.8 93.4 -5 1 1 0 08 39 30 08 46 00 --- 09 46 19 53.6 -60.9 2.9 92.2 385 F 1 0 08 46 00 J0655+4100 09 46 19 54.5 -61.7 2.8 92.3 -5 1 1 0 08 46 00 08 49 30 =0651+410 09 49 50 53.8 -61.8 2.9 91.7 205 F 1 0 08 50 30 J0655+4100 09 50 50 53.6 -61.8 2.9 91.5 57 1 1 0 08 50 30 08 54 00 =0651+410 09 54 21 53.0 -61.8 3.0 90.9 210 F 1 0 08 54 00 4C41.17 09 54 21 52.1 -61.0 3.1 90.8 -5 1 1 0 08 54 00 09 00 30 --- 10 00 52 50.9 -61.0 3.2 89.7 385 F 1 0 09 00 30 J0655+4100 10 00 52 51.7 -61.8 3.1 89.8 -5 1 1 0 09 00 30 09 04 00 =0651+410 10 04 22 51.1 -61.8 3.1 89.2 205 F 1 0 09 04 00 4C41.17 10 04 22 50.3 -61.0 3.2 89.2 -5 1 1 0 09 04 00 09 10 30 --- 10 10 53 49.0 -60.9 3.3 88.1 385 F 1 0 09 10 30 J0655+4100 10 10 53 49.8 -61.8 3.3 88.2 -5 1 1 0 09 10 30 09 14 00 =0651+410 10 14 24 49.2 -61.7 3.3 87.7 205 F 1 0 09 15 30 DA193 10 15 54 37.5 -61.3 4.3 78.0 49 1 1 0 09 15 30 09 25 30 --- 10 25 56 35.6 -60.8 4.5 76.7 600 F 1 0 09 26 30 J0655+4100 10 26 56 46.8 -61.5 3.5 85.8 21 1 1 0 09 26 30 09 30 00 =0651+410 10 30 27 46.2 -61.4 3.6 85.2 210 F 1 0 09 30 00 4C41.17 10 30 27 45.4 -60.6 3.7 85.1 -5 1 1 0 09 30 00 09 36 30 --- 10 36 58 44.2 -60.5 3.8 84.2 385 F 1 0 09 36 30 J0655+4100 10 36 58 44.9 -61.3 3.7 84.3 -5 1 1 0 09 36 30 09 40 00 =0651+410 10 40 28 44.3 -61.2 3.7 83.8 205 F 1 0 09 40 00 4C41.17 10 40 28 43.5 -60.4 3.8 83.6 -4 1 1 0 09 40 00 09 46 30 --- 10 46 59 42.3 -60.2 3.9 82.7 386 F 1 0 Schedule for SHANGHAI (Code Sh ) Page 4 Radio/jet Host Galaxy Interactions UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sun 5 Jun 2005 Day 156 --- 09 46 30 J0655+4100 10 46 59 43.0 -61.0 3.9 82.8 -4 1 1 0 09 46 30 09 50 00 =0651+410 10 50 30 42.4 -60.9 3.9 82.3 206 F 1 0 09 51 00 J0655+4100 10 51 30 42.2 -60.8 3.9 82.2 57 1 1 0 09 51 00 09 54 30 =0651+410 10 55 01 41.5 -60.7 4.0 81.7 210 F 1 0 09 54 30 4C41.17 10 55 01 40.8 -59.9 4.1 81.5 -4 1 1 0 09 54 30 10 01 00 --- 11 01 32 39.6 -59.6 4.2 80.6 386 F 1 0 10 01 00 J0655+4100 11 01 32 40.3 -60.5 4.1 80.8 -4 1 1 0 10 01 00 10 04 30 =0651+410 11 05 02 39.7 -60.3 4.2 80.3 206 F 1 0 10 04 30 4C41.17 11 05 02 39.0 -59.5 4.2 80.1 -4 1 1 0 10 04 30 10 11 00 --- 11 11 33 37.8 -59.2 4.3 79.2 386 F 1 0 10 11 00 J0655+4100 11 11 33 38.5 -60.0 4.3 79.4 -4 1 1 0 10 11 00 10 14 30 =0651+410 11 15 04 37.8 -59.9 4.3 78.9 206 F 1 0 10 15 30 J0655+4100 11 16 04 37.6 -59.8 4.3 78.8 57 1 1 0 10 15 30 10 19 00 =0651+410 11 19 35 37.0 -59.7 4.4 78.3 210 F 1 0 10 19 00 4C41.17 11 19 35 36.3 -58.9 4.5 78.1 -4 1 1 0 10 19 00 10 25 30 --- 11 26 06 35.1 -58.5 4.6 77.2 386 F 1 0 10 25 30 J0655+4100 11 26 06 35.8 -59.4 4.5 77.5 -4 1 1 0 10 25 30 10 29 00 =0651+410 11 29 36 35.1 -59.2 4.6 77.0 206 F 1 0 10 29 00 4C41.17 11 29 36 34.5 -58.4 4.6 76.7 -4 1 1 0 10 29 00 10 35 30 --- 11 36 07 33.3 -58.0 4.7 75.9 386 F 1 0 10 35 30 J0655+4100 11 36 07 33.9 -58.8 4.7 76.1 -4 1 1 0 10 35 30 10 39 00 =0651+410 11 39 38 33.3 -58.6 4.7 75.6 206 F 1 0 10 40 00 J0655+4100 11 40 38 33.1 -58.6 4.8 75.5 57 1 1 0 10 40 00 10 43 30 =0651+410 11 44 09 32.5 -58.4 4.8 75.0 210 F 1 0 10 43 30 4C41.17 11 44 09 31.8 -57.6 4.9 74.8 -4 1 1 0 10 43 30 10 50 00 --- 11 50 40 30.6 -57.2 5.0 73.9 386 F 1 0 10 50 00 J0655+4100 11 50 40 31.3 -58.0 4.9 74.2 -4 1 1 0 10 50 00 10 53 30 =0651+410 11 54 10 30.6 -57.8 5.0 73.7 206 F 1 0 10 53 30 4C41.17 11 54 10 30.0 -57.0 5.0 73.4 -4 1 1 0 10 53 30 11 00 00 --- 12 00 41 28.9 -56.5 5.2 72.5 386 F 1 0 Schedule for SHANGHAI (Code Sh ) Page 5 Radio/jet Host Galaxy Interactions UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sun 5 Jun 2005 Day 156 --- 11 00 00 J0655+4100 12 00 41 29.5 -57.4 5.1 72.8 -4 1 1 0 11 00 00 11 03 30 =0651+410 12 04 12 28.8 -57.1 5.1 72.4 206 F 1 0 11 04 30 J0655+4100 12 05 12 28.7 -57.1 5.2 72.3 57 1 1 0 11 04 30 11 08 00 =0651+410 12 08 43 28.0 -56.8 5.2 71.8 210 F 1 0 11 08 00 4C41.17 12 08 43 27.4 -56.0 5.3 71.5 -4 1 1 0 11 08 00 11 14 30 --- 12 15 14 26.3 -55.6 5.4 70.6 386 F 1 0 11 14 30 J0655+4100 12 15 14 26.9 -56.4 5.3 70.9 -4 1 1 0 11 14 30 11 18 00 =0651+410 12 18 44 26.2 -56.2 5.4 70.5 206 F 1 0 11 18 00 4C41.17 12 18 44 25.6 -55.3 5.5 70.1 -4 1 1 0 11 18 00 11 24 30 --- 12 25 15 24.5 -54.9 5.6 69.2 386 F 1 0 11 24 30 J0655+4100 12 25 15 25.1 -55.7 5.5 69.6 -4 1 1 0 11 24 30 11 28 00 =0651+410 12 28 46 24.5 -55.4 5.6 69.1 206 F 1 0 11 29 00 J0655+4100 12 29 46 24.3 -55.4 5.6 69.0 57 1 1 0 11 29 00 11 32 30 =0651+410 12 33 17 23.7 -55.1 5.6 68.5 210 F 1 0 11 32 30 4C41.17 12 33 17 23.1 -54.3 5.7 68.1 -4 1 1 0 11 32 30 11 39 00 --- 12 39 48 22.0 -53.8 5.8 67.3 386 F 1 0 11 39 00 J0655+4100 12 39 48 22.5 -54.6 5.7 67.6 -4 1 1 0 11 39 00 11 42 30 =0651+410 12 43 18 21.9 -54.3 5.8 67.2 206 F 1 0 11 42 30 4C41.17 12 43 18 21.4 -53.5 5.9 66.8 -4 1 1 0 11 42 30 11 49 00 --- 12 49 49 20.3 -53.0 6.0 65.9 386 F 1 0 11 49 00 J0655+4100 12 49 49 20.8 -53.8 5.9 66.3 -4 1 1 0 11 49 00 11 52 30 =0651+410 12 53 20 20.2 -53.5 6.0 65.8 206 F 1 0 11 53 30 J0655+4100 12 54 20 20.0 -53.4 6.0 65.7 57 1 1 0 11 53 30 11 57 00 =0651+410 12 57 51 19.4 -53.1 6.0 65.2 210 F 1 0 11 57 00 4C41.17 12 57 51 18.9 -52.3 6.1 64.8 -4 1 1 0 11 57 00 12 03 30 --- 13 04 22 17.8 -51.7 6.2 63.9 386 F 1 0 12 03 30 J0655+4100 13 04 22 18.3 -52.6 6.1 64.3 -4 1 1 0 12 03 30 12 07 00 =0651+410 13 07 52 17.7 -52.3 6.2 63.8 206 F 1 0 12 07 00 4C41.17 13 07 52 17.2 -51.4 6.3 63.4 -4 1 1 0 12 07 00 12 13 30 --- 13 14 23 16.1 -50.9 6.4 62.5 386 F 1 0 Schedule for SHANGHAI (Code Sh ) Page 6 Radio/jet Host Galaxy Interactions UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sun 5 Jun 2005 Day 156 --- 12 13 30 J0655+4100 13 14 23 16.6 -51.7 6.3 62.9 -4 1 1 0 12 13 30 12 17 00 =0651+410 13 17 54 16.0 -51.4 6.4 62.4 206 F 1 0 12 18 00 J0655+4100 13 18 54 15.8 -51.3 6.4 62.3 57 1 1 0 12 18 00 12 21 30 =0651+410 13 22 25 15.3 -51.0 6.4 61.8 210 F 1 0 12 21 30 4C41.17 13 22 25 14.8 -50.1 6.5 61.3 -4 1 1 0 12 21 30 12 28 00 --- 13 28 56 13.7 -49.5 6.6 60.4 386 F 1 0 12 28 00 J0655+4100 13 28 56 14.2 -50.4 6.6 60.9 -4 1 1 0 12 28 00 12 31 30 =0651+410 13 32 26 13.6 -50.0 6.6 60.4 206 F 1 0 12 31 30 4C41.17 13 32 26 13.2 -49.2 6.7 59.9 -4 1 1 0 12 31 30 12 38 00 --- 13 38 57 12.1 -48.5 6.8 59.0 386 F 1 0 12 38 00 J0655+4100 13 38 57 12.5 -49.4 6.7 59.5 -4 1 1 0 12 38 00 12 41 30 =0651+410 13 42 28 12.0 -49.1 6.8 59.0 206 F 1 0 12 42 30 J0655+4100 13 43 28 11.8 -49.0 6.8 58.8 57 1 1 0 12 42 30 12 46 00 =0651+410 13 46 59 11.2 -48.6 6.9 58.3 210 F 1 0 12 46 00 4C41.17 13 46 59 10.8 -47.7 6.9 57.8 -4 1 1 0 12 46 00 12 52 30 --- 13 53 30 9.8 -47.1 7.0 56.8 386 F 1 0 12 52 30 J0655+4100 13 53 30 10.2 -47.9 7.0 57.4 -4 1 1 0 12 52 30 12 56 00 =0651+410 13 57 00 9.6 -47.6 7.0 56.9 206 F 1 0 12 56 00 4C41.17 13 57 00 9.2 -46.7 7.1 56.3 -4 1 1 0 12 56 00 13 02 30 --- 14 03 31 8.2 -46.0 7.2 55.3 386 F 1 0 13 02 30 J0655+4100 14 03 31 8.6 -46.9 7.1 55.9 -4 1 1 0 13 02 30 13 06 00 =0651+410 14 07 02 8.1 -46.5 7.2 55.4 206 F 1 0 13 07 00 J0655+4100 14 08 02 7.9 -46.4 7.2 55.2 57 1 1 0 13 07 00 13 10 30 =0651+410 14 11 33 7.4 -46.0 7.3 54.7 210 F 1 0 13 10 30 4C41.17 14 11 33 7.0 -45.1 7.3 54.1 -4 1 1 0 13 10 30 13 17 00 --- 14 18 04 6.0 -44.4 7.4 53.1 386 F 1 0 13 17 00 J0655+4100 14 18 04 6.4 -45.3 7.4 53.7 -4 1 1 0 13 17 00 13 20 30 =0651+410 14 21 34 5.8 -44.9 7.4 53.2 206 F 1 0 13 20 30 4C41.17 14 21 34 5.5 -44.0 7.5 52.6 -4 1 1 0 13 20 30 13 27 00 --- 14 28 05 4.5 -43.2 7.6 D 51.6 0 F 1 0 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: es054.18cm Matches group sh18cm in /aps3/sched/catalogs/freq.dat Huang Xinyong 170300, dual pol but narrow(?) ****** Only 107.02 of 128.00 MHz total bandwidth is within the IFs in the setup file before any FREQ or DOPPLER shifts. Setup group: 7 Station: SHANGHAI Total bit rate: 512 Format: MKIV1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 16 Passes/head pos: 1 Speedup factor: 1.00 1st LO= 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 Net SB= L L U U L L U U L L U U L L U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 2 1 2 3 4 3 4 5 6 5 6 7 8 7 8 BBC SB= U U L L U U L L U U L L U U L L IF = C A C A C A C A C A C A C A C A The following frequency sets based on this setup were used. Frequency Set: 7 Setup file default. Used pcal sets: 1 LO sum= 1634.49 1634.49 1634.49 1634.49 1650.49 1650.49 1650.49 1650.49 1666.49 1666.49 1666.49 1666.49 1682.49 1682.49 1682.49 1682.49 BBC fr= 565.51 565.51 565.51 565.51 549.51 549.51 549.51 549.51 533.51 533.51 533.51 533.51 517.51 517.51 517.51 517.51 Bandwd= 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = 1MHZ PCALXB1= S1 S3 S5 S7 S9 S11 S13 S15 PCALXB2= S2 S4 S6 S8 S10 S12 S14 S16 PCALFR1= 490 510 490 510 490 510 490 510 PCALFR2= 490 510 490 510 490 510 490 510 Track assignments are: track1= 2, 10, 18, 26, 3, 11, 19, 27, 66, 74, 82, 90, 67, 75, 83, 91 barrel=roll_off SOURCE LIST -- Radio/jet Host Galaxy Interactions Catalog positions marked with *. Precession of date coordinates is based on stop time of first scan. Names used in schedule marked with *. Short names used in VLA and SNAP files marked with +. Observation date used in B1950/J2000 coordinate conversion (PRECDATE): 1979.900 No adjustments are made for rates (DRA, DDEC). Scan hours are for recording scans only. Baseline hours are only counted for scans above horizon at both ends. Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * 4C41.17 06 47 20.576778 * 06 50 52.145100 06 51 13.053788 0.00 41 34 03.83066 * 41 30 30.77300 41 30 19.65263 0.00 From catalog imbedded in main SCHED input file. 5.633 scan hours, 207.201 baseline hours above horizon. J0555+3948 05 52 01.407172 * 05 55 30.805614 05 55 51.285273 0.26 0552+398 39 48 21.94585 * 39 48 49.16500 39 49 00.54332 0.40 * DA193 /aps3/sched/catalogs/sources.vlba J0555+39 VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.267 scan hours, 12.000 baseline hours above horizon. * J0655+4100 06 51 39.714007 * 06 55 10.024734 06 55 30.833477 0.30 0651+410 41 04 01.58306 * 41 00 10.15992 40 59 57.21211 0.44 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 4.517 scan hours, 163.540 baseline hours above horizon. J1331+3030 13 28 49.657757 * 13 31 08.288049 13 31 24.189185 0.37 1328+307 30 45 58.64062 * 30 30 32.95926 30 28 58.21673 0.47 * 3C286 /aps3/sched/catalogs/sources.vlba J1331+30 VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.333 scan hours, 9.230 baseline hours above horizon. The solar corona can cause unstable phases for sources too close to the Sun. SCHED provides warnings at individual scans for distances less than 10 degrees. The distance from the Sun to each source in this schedule is: Source Sun distance (deg) 4C41.17 30.8 DA193 21.5 J0655+4100 31.3 3C286 107.9 Barry Clark estimates from predictions by Ketan Desai of IPM scattering sizes that the Sun will cause amplitude reductions on the longest VLBA baselines at a solar distance of 60deg F^(-0.6) where F is in GHz. For common VLBI bands, this is: 327 MHz 117. deg 610 MHz 81. deg 1.6 GHz 45. deg 2.3 GHz 36. deg 5.0 GHz 23. deg 8.4 GHz 17. deg 15.0 GHz 12. deg 22.0 GHz 9. deg 43.0 GHz 6. deg